bug#12430: Glitches caused by addition of psec to timers

[Eli Zaretskii]

> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Cc: eggert@cs.ucla.edu,  12430@debbugs.gnu.org
> Date: Fri, 14 Sep 2012 09:18:47 -0400
> 
> > I will remember that when I write a hard-realtime application in
> > Emacs Lisp.
> 
> Nanoseconds are real.  Think about it: if the eldoc timer is always late
> by a nanosecond each time, over your whole lifetime this might add up to
> your wasting a measurable amount of your life waiting unnecessarily.
> Do you really want to die cursing those wasted nanoseconds?
> I didn't think so,

If you studied the various OSes and worked with hard realtime programs
as much as I did, you wouldn't bet your life on the precision of their
timers.